arch/arm64/include/asm/Kbuild - kernel/common - Git at Google

 # SPDX-License-Identifier: GPL-2.0
 generic-y += early_ioremap.h
 generic-y += mcs_spinlock.h
 generic-y += qrwlock.h
 generic-y += qspinlock.h
 generic-y += set_memory.h
 generic-y += user.h
	# SPDX-License-Identifier: GPL-2.0
	generic-y += early_ioremap.h
	generic-y += mcs_spinlock.h
	generic-y += qrwlock.h
	generic-y += qspinlock.h
	generic-y += set_memory.h
	generic-y += user.h